Brand: JR Model number: JR-EL115 Type: Earphones Color: Grey Dimensions: 13.1 x 8.2 x 2.2 cm Weight: 0.039 kg Sensitivity: 90to3 dB Frequency response range: 20Hz~20KHz Microphone sensitivity: -45to3 dB Impedance: 16 to 15% Rated power: 3 mW Driving unit: 10 mm Material: TPE , Choose The Best In-ear Headphones for Yourselft Make hands-free calls easily with built-in microphone Ergonomic design provides a comfortable fit for your ears. Excellent balanced sound crisp, let you get a more realistic music experience. Exceptional listening experience with a well-balanced sound. Multi-Function Button With in-line microphone can conveninet to make calls,end calls play/pause/answer and skipping tracks forward and back. you can talk in the phone anywhere and anytime, ou can talk on the phone anywhere and anytime, free your hands! Ergonomic design Ergonomic design provides a comfortable fit for your ears, it not only give you a comfortable listening experience but also less likely to fall out even when you are running, hiking or jogging. Excellent sound and Noise Isolation Earbuds with high-quality sound insulation materials provide you a noise isolating environment. Balanced tonal adjustment with deep bass and excellent stereo sound that let you have a better listening experience,earbuds are perfect for daily use. Wide Compatibility In-ear headphones compatible with iPod, iPhone, iPad, Android smartphones , tablets, mp3 players music speaker and others devices that with a standard 3.5mm audio jack.